by Vadim Tkachenko | Apr 19, 2017 | MySQL, Percona Software
In our latest release of Percona XtraDB Cluster, we’ve introduced major performance improvements to the MySQLwrite-set replication layer. In this post, we want to show what these improvements look like. For the test, we used the sysbench OLTP_RW, UPDATE_KEY and...
by Alexey Zhebel | Apr 19, 2017 | Insight for DBAs, MySQL, Percona Events, Percona Software, ProxySQL
Percona announces the release of Percona XtraDB Cluster 5.7.17-29.20 on April 19, 2017. Binaries are available from the downloads section or our software repositories. NOTE: You can also run Docker containers from the images in the Docker Hub repository. Percona...
by Przemysław Malkowski | Feb 24, 2017 | Insight for DBAs, Insight for Developers, MySQL
UPDATE: Some of the language in the original post was considered overly-critical of Oracle by some community members. This was not my intent, and I’ve modified the language to be less so. I’ve also changed the term “synchronous” (which the use of is...
by Manjot Singh | Jun 2, 2016 | Percona Software
In this post, we’ll discuss the Galera warning “last inactive check” and what it means. Problem I’ve been working with Percona XtraDB Cluster quite a bit recently, and have been investigating various warnings. I came across this one today:...
by Manjot Singh | May 27, 2016 | MySQL, Percona Software
In this blog, we’ll discuss the ramifications of the Galera Error Failed to Report Last Committed (Interrupted System Call). I have recently seen this error with Percona XtraDB Cluster (or Galera): [Warning] WSREP: Failed to report last committed 549684236, -4...
by Peter Zaitsev | May 4, 2016 | MySQL
This blog post discusses what is going on in the MySQL high availability market, and what Percona’s plans are for helping customers with high availability solutions. One thing I like to tell people is that you shouldn’t view Percona as a “software” company, but...
by Jervin Real | Oct 26, 2015 | Percona Software
While we should be aiming for small and fast transactions with Galera, it is always possible at some point you might want a single large transaction, but what is involved? First, this is supposed to be controlled by two settings, wsrep_max_ws_rows and...
by Jay Janssen | Aug 20, 2015 | MySQL, Percona Software
State Snapshot Transfer (SST) at a glance PXC uses a protocol called State Snapshot Transfer to provision a node joining an existing cluster with all the data it needs to synchronize. This is analogous to cloning a slave in asynchronous replication: you take a full...
by Jay Janssen | Jul 16, 2015 | MySQL, Percona Software
In my previous post, I used incremental backups in Percona XtraBackup as a method for rebuilding a Percona XtraDB Cluster (PXC) node without triggering an actual SST. Practically this reproduces the SST steps, but it can be handy if you already had backups available...
by Jay Janssen | Jul 16, 2015 | MySQL, Percona Software
Beware the SST In Percona XtraDB Cluster (PXC) I often run across users who are fearful of SSTs on their clusters. I’ve always maintained that if you can’t cope with a SST, PXC may not be right for you, but that doesn’t change the fact that SSTs with...
by Stephane Combaudon | Jun 3, 2015 | Insight for DBAs, MySQL, Percona Software
Some applications have a heavy write workload on a few records – for instance when incrementing a global counter: this is called a write hotspot. Because you cannot update the same row simultaneously from multiple threads, this can lead to performance...
by Jay Janssen | Jun 2, 2015 | Insight for DBAs, MySQL
It seems these days if anyone knows anything about tuning InnoDB, it’s that you MUST tune your innodb_buffer_pool_size to 80% of your physical memory. This is such prolific tuning advice, it seems ingrained in many a DBA’s minds. The MySQL manual to this...
by Stephane Combaudon | Apr 28, 2015 | Insight for DBAs, MySQL, Percona Software
I often talk with people who are very interested in the features of Percona XtraDB Cluster (PXC) such as synchronous and parallel replication, multi-node writing and high availability. However some get confused when operating a real PXC cluster because they do not...
by Stephane Combaudon | Mar 13, 2015 | Insight for DBAs, MySQL, Percona Software, Webinars
My webinar “Multi-threaded Replication in MySQL 5.6 and 5.7” on February 25 generated several excellent questions following the presentation (available an online migration to GTIDs and that’s why here.
by Stephane Combaudon | Dec 30, 2014 | MySQL, Percona Software
State Snapshot Transfer (SST) is used in Percona XtraDB Cluster (PXC) when a new node joins the cluster or to resync a failed node if Incremental State Transfer (IST) is no longer available. SST is triggered automatically but there is no magic: If it is not configured...
by Jay Janssen | Dec 22, 2014 | MySQL, Percona Software
Background on Backup Locks I was very excited to see Backup locks support in release notes for the latest Percona XtraDB Cluster 5.6.21 release. For those who are not aware, backup locks offer an alternative to FLUSH TABLES WITH READ LOCK (FTWRL) in
by Jay Janssen | Nov 14, 2014 | Insight for DBAs, MySQL, Percona Software
Thanks to all who attended my Nov. 12 webinar titled, “Percona XtraDB Cluster as a MySQL HA Solution for OpenStack.” I had several questions which I covered at the end and a few that I didn’t. You can view the entire webinar and download the slides...
by Stephane Combaudon | Oct 3, 2014 | Insight for DBAs, MySQL
HAProxy is frequently used as a load-balancer in front of a Galera cluster. While diagnosing an issue with HAProxy configuration, I realized that logging doesn’t work out of the box on CentOS 6.5. Here is a simple recipe to fix the issue. If you look at the top...
by Jay Janssen | Sep 22, 2014 | MySQL, Percona Services, Percona Software
Interest in Percona XtraDB Cluster / Galera has been high ever since we introduced the product in 2012. I typically have a conversation about Galera and Percona XtraDB Cluster (PXC) at least once a week with a consulting customer who wants to know if it will be a...
by Jay Janssen | Sep 3, 2014 | Insight for DBAs, MySQL, Percona Services, Percona Software, Webinars
Join me online next week (September 10 at 10 a.m. PDT) for my live webinar on Migrating to Percona XtraDB Cluster. This was a popular webinar that I gave a few years ago, so I’m doing it again with updates for Register here!
